Lumber rule



A. WAELTZ LUMBER RULE Jul 11, 1939.

Filed Dec. '28, 1957 Marian MBZZZ ATTORNEYS WITNESS Patented July 11,1939 UNITED STATES PATENT OFFICE 1 Claim.

The invention relates to a computing rule and more especially to alumber rule.

The primary object of the invention is the provision of a rule of thischaracter, wherein the 5 same is usuable for reliably gauging the numberof boards of selected thicknesses that may be cut in a saw mill from alog without undue waste in material and assuring a uniformity ofthicknesses in the boards when out from the log.

10 Another object of the invention is the provision of a rule of thischaracter, wherein adjustment thereof for gauging thicknesses ofmaterial may be had and the number of pieces thereof can be ascertainedprior to the cutting of the pieces,

15 especially when cutting a log, the rule being novel in its make-upand is susceptible of easy and convenient handling in the use thereof.

A further object of the invention is the provision of a rule of thischaracter, which is sim- 20 ple in its construction, thoroughly reliableand efficient in operation, durable, assuring a high degree of accuracyin measuring material and inexpensive to manufacture.

With these and other objects in view, the in- 25 vention consists in thefeatures of construction, combination and arrangement of parts as willbe hereinafter more fully described, illustrated in the accompanyingdrawing, which discloses the preferred embodiment of the invention and30 pointed out in the claim hereunto appended.

In the accompanying drawing:

Figure 1 is an elevation of the rule constructed in accordance with theinvention shown in position for measuring the number of boards of a 35determined thickness to be had from a log on the cutting thereof in asaw mill.

Figure 2 is an end elevation.

Figure 3 is an enlarged fragmentary elevation partly in section of therule.

40 Similar reference characters indicate corresponding parts throughoutthe several views in the drawing.

Referring to the drawing in detail, A designates generally the ruleconstructed in accordance with the invention and B denotesdiagrammatically a log or a piece of work to be cut into boards, thethicknesses of the boards to be out being indicated at 5, and suchthicknesses discerned through the use of the rule allowing for the kerfof the saw blade or blades in the severing of the boards in the millwith the result that the boards when cut will have uniform thicknesswith respect to each other and such thick- 55 ness thereof determinedfrom a reading of the scale upon the rule and also the number of boardsobtainable from the log B.

The rule A comprises an elongated body 6 which may be made from wood orsome molded composition material and provided with a plurality ofmeasuring sides or faces 7, each being flat and extended longitudinallyof the said body.

At one end of the body is formed a handle or grip 8 while at the otherend of said body is a rotatable disk 9 journaled upon a pivot pin or 10fastener 10, which is passed through a suitable clearance centrally inthe disk 9 and anchored in the center or longitudinal axis of the body6. This pin or fastener I0 is formed with an outer end head H whilebetween it and the disk 9 is a coiled expansion spring 12, beingdisposed about the pin or fastener It and has a seating against washers13, one resting against the head H and the other against the disk 9 sothat the latter will be yieldably held in contacting relation to thebody 8 and also such body may be rotated relative to the disk. The disk9 is cut away to form a flat rest edge [4, which is in a plane flushwith any one of the flat faces or walls 3 of the body, and allows thelatter to be held in relation to a flattened end face of the log orother piece of work B in that the edge i l will make contact with thisface and the disk 9 functions as a bearing for said body 6 withoutliability of any rolling activity of such body 6 when in workingposition for measuring and ruling purposes.

Each of the flat faces I has provided thereon scales, which involvegraduations l5 in association with indicia l6 and ll, respectively,these being independent of each other and arranged in row formation, theindicia it being indicative of the thickness of a board or slab whilethe indicia [1 enables the determining of the number of boards of apredetermined thickness that may be cut from a piece such as the log B.The indicia l6 includes the size of the kerf to be cut by a saw of amill so that on the cutting of the boards or slabs they will be of auniform thickness elected by a scale appearing on the rule body 6 at thefaces or walls 7 thereof.

In the use of the rule in advance of cutting boards from a log B, thethickness of the boards 5 to be cut therefrom can be determined inadvance of the cutting of the same so that the cut boards in accordancewith a selected scale on the rule will be of a determined thickness andalso it may be discerned of the number of boards that may be cut fromthe log of a determined thickness before the cutting of such boards andin this Way avoiding waste resultant from the sawing of the log withoutmeasurements had as before stated.

The marks I 5 on the faces or walls I are usable for setting the saws ofthe mill for the cutting of boards of predetermined thickness from a logon the operation of the mill.

The showing made of this rule in the drawing is for use for a right handsaw and to adapt the invention for a left hand saw the characters on therule are reversed.

What is claimed is:

A rule of the character described comprising a the same in contactingrelation to the end next 10 thereto of said body.

ANTON WAELTZ.

